l*UI)CEEI)lMiS, li>lJ:. 



49 



ni-e about fifteen uiiU's distant from Jlount Lehman ; they came in on a north wind 

 and toolc about three days for tlieir journey. 



Some of you may wonder how some of these results have been obtained. How- 

 ever, the solution is comparatively simple. With many insects it would appear, I 

 imagine, to be very difficult to determine when their numbers were actually on the 

 increase or decrease, since they have several hosts. But in this case with bitin^- 

 Hies the hosts are limited to domestic animals. As an example of my method of 

 determining the comparative numl>prs of the different .species, I give the records 

 for July .5th, ITith. and 2.-ith. liJll :— 



Sinie I have been living on the Lower Fraser River I have made many attempts 

 to find the breeding-jilaces of the Tabanida>, up to the present time without success. 

 The country is a difficult one to work in owing to the amount of water, both stagnant 

 and running, and the heav.v timber. The place where most of my observations were 

 made was at Mount Lehman. This is a heavily wooded place, surrounded by hills. 

 During the whole time I was there I was never able to capture a male, and the 

 thought struck me that perhaps the tiles did not actually breed there. There was 

 one field in which tlie flies were always plentiful during fine weather. I did my best 

 to find out where they w-ent in wet weather, but without success, although I beat 

 the bushes round the field a number of times. In sjieaking about this to entomolo- 

 gists in the Province, the.v one and all agreed that males were mor-e frequently 

 encountered in the mountains, so it appeared to me that there was a possibility of 

 the warm rocks attracting the females also, during the cold weather. There is a 

 crying need for work to be done on the Tabanidre in Canada. As far as I know, uo 

 life-history work has ever been seriously undertaken. The Tabanida* are insects of 

 great economic importance, and if their life-histories were known it is fjuite possible 

 that something could be done to reduce their numbers. 



In closing, I have to record a now fly for the Province, Ilnpodcnna Vinculum. 

 I was successful in breeding tliis fl.v from the larvjc last summer. I had already 

 taken the larva of this species, but there were no records of the adult fly in our 

 proceedings. 



Tour President requested me to say something about tick paralysis for the 

 benefit of the members who had not read my jiaper in " Parasitology."* 



I -shall conclude my address by expressing the hope that the members of this 

 Society will devote more attention to this important group of blood-sucking flies than 

 has been accorded to them hitherto. 



' This inforniiitiDn. being alri'.idy imlilishcd, is not iiuliKi'fl In this paper. — Skcrktauv. 



